WO2021015461A1 - Module de batterie et bloc-batterie le comprenant - Google Patents

Module de batterie et bloc-batterie le comprenant Download PDF

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Publication number
WO2021015461A1
WO2021015461A1 PCT/KR2020/009062 KR2020009062W WO2021015461A1 WO 2021015461 A1 WO2021015461 A1 WO 2021015461A1 KR 2020009062 W KR2020009062 W KR 2020009062W WO 2021015461 A1 WO2021015461 A1 WO 2021015461A1
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WO
WIPO (PCT)
Prior art keywords
side portion
module frame
module
battery
frame
Prior art date
Application number
PCT/KR2020/009062
Other languages
English (en)
Korean (ko)
Inventor
최종화
성준엽
박명기
정지훈
Original Assignee
주식회사 엘지화학
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority claimed from KR1020200082574A external-priority patent/KR102475180B1/ko
Application filed by 주식회사 엘지화학 filed Critical 주식회사 엘지화학
Priority to EP20844948.8A priority Critical patent/EP3934015A4/fr
Priority to JP2021553110A priority patent/JP7282436B2/ja
Priority to US17/601,200 priority patent/US20220166098A1/en
Priority to CN202080022446.8A priority patent/CN113614990B/zh
Publication of WO2021015461A1 publication Critical patent/WO2021015461A1/fr

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    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/20—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders
    • H01M50/204—Racks, modules or packs for multiple batteries or multiple cells
    • H01M50/207—Racks, modules or packs for multiple batteries or multiple cells characterised by their shape
    • H01M50/211—Racks, modules or packs for multiple batteries or multiple cells characterised by their shape adapted for pouch cells
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/20—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders
    • H01M50/204—Racks, modules or packs for multiple batteries or multiple cells
    • H01M50/207—Racks, modules or packs for multiple batteries or multiple cells characterised by their shape
    • H01M50/209—Racks, modules or packs for multiple batteries or multiple cells characterised by their shape adapted for prismatic or rectangular cells
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/20—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/20—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders
    • H01M50/258—Modular batteries; Casings provided with means for assembling
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M10/00—Secondary cells; Manufacture thereof
    • H01M10/60—Heating or cooling; Temperature control
    • H01M10/61—Types of temperature control
    • H01M10/613—Cooling or keeping cold
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M10/00—Secondary cells; Manufacture thereof
    • H01M10/60—Heating or cooling; Temperature control
    • H01M10/65—Means for temperature control structurally associated with the cells
    • H01M10/653—Means for temperature control structurally associated with the cells characterised by electrically insulating or thermally conductive materials
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M10/00—Secondary cells; Manufacture thereof
    • H01M10/60—Heating or cooling; Temperature control
    • H01M10/65—Means for temperature control structurally associated with the cells
    • H01M10/655—Solid structures for heat exchange or heat conduction
    • H01M10/6551—Surfaces specially adapted for heat dissipation or radiation, e.g. fins or coatings
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/20—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders
    • H01M50/218—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders characterised by the material
    • H01M50/22—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders characterised by the material of the casings or racks
    • H01M50/222—Inorganic material
    • H01M50/224—Metals
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/20—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders
    • H01M50/218—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders characterised by the material
    • H01M50/22—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders characterised by the material of the casings or racks
    • H01M50/227—Organic material
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/20—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders
    • H01M50/218—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders characterised by the material
    • H01M50/22—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders characterised by the material of the casings or racks
    • H01M50/231—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders characterised by the material of the casings or racks having a layered structure
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/20—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders
    • H01M50/244—Secondary casings; Racks; Suspension devices; Carrying devices; Holders characterised by their mounting method
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/20—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders
    • H01M50/262—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders with fastening means, e.g. locks
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M2220/00—Batteries for particular applications
    • H01M2220/20—Batteries in motive systems, e.g. vehicle, ship, plane
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
    • Y02E60/10—Energy storage using batteries

Definitions

  • the present invention relates to a battery module and a battery pack including the same, and more particularly, to a battery module capable of securing stiffness in a lateral direction without unnecessary weight increase, and a battery pack including the same.
  • Secondary batteries having high ease of application according to product groups and having electrical characteristics such as high energy density are commonly applied to electric vehicles or hybrid vehicles driven by electric drive sources, power storage devices, as well as portable devices.
  • Such a secondary battery is attracting attention as a new energy source for eco-friendly and energy efficiency enhancement in that it does not generate by-products from the use of energy as well as the primary advantage that it can dramatically reduce the use of fossil fuels.
  • the medium and large-sized battery modules are preferably manufactured with a small size and weight as possible, prismatic batteries and pouch-type batteries, which can be stacked with a high degree of integration and have a small weight to capacity, are mainly used as battery cells of the medium and large battery modules.
  • the battery module may include a frame member whose front and rear surfaces are opened to accommodate the stack of battery cells in an inner space.
  • FIG. 1 is an exploded perspective view showing a battery module having a conventional mono frame.
  • the battery module includes a battery cell stack 12 formed by stacking a plurality of battery cells 11, a mono frame 20 with open front and rear surfaces to cover the battery cell stack 12, and It may include end plates 60 covering the front and rear surfaces of the mono frame 20.
  • a battery cell stack 12 formed by stacking a plurality of battery cells 11, a mono frame 20 with open front and rear surfaces to cover the battery cell stack 12, and It may include end plates 60 covering the front and rear surfaces of the mono frame 20.
  • horizontal assembly is required so that the battery cell stack 12 is inserted into the open front or rear of the mono frame 20 along the X-axis direction as shown in the arrow shown in FIG. 1.
  • clearance means a gap generated by fitting or the like. If the free space is small, component damage may occur during horizontal assembly.
  • the height of the mono frame 20 should be designed to be large in consideration of the maximum height of the battery cell stack 12 and the assembly tolerance in the insertion process, and thus, unnecessary wasted space may occur. .
  • the internal electrolyte is decomposed and gas is generated so that the battery cell 11 swells, that is, a swelling phenomenon may occur.
  • the thickness of the mono frame 20 must be increased to withstand this.
  • the thickness of the mono frame 20 is increased, the thickness of the upper and lower surfaces irrelevant to the swelling phenomenon increases, and thus the weight of the battery module is unnecessarily increased.
  • a thermally conductive resin layer (not shown) may be formed between the battery cell stack 12 and the mono frame 20.
  • the thermally conductive resin layer may serve to transfer heat generated from the battery cell stack to the outside of the battery module and to fix the battery cell stack in the battery module.
  • the amount of the thermally conductive resin layer used may increase more than necessary.
  • the problem to be solved by the present invention is to provide a battery module that improves space utilization, secures stiffness in the lateral direction without unnecessary weight increase, and minimizes the use of thermally conductive resin, and a battery pack including the same. .
  • a battery module includes a battery cell stack in which a plurality of battery cells are stacked; And a module frame accommodating the battery cell stack, wherein the module frame includes a first module frame with an open top and a second module frame with an open bottom, and the first module frame includes a first side portion, A second side portion and a bottom portion connecting the first side portion and the second side portion, and the second module frame includes a third side portion, a fourth side portion, and a ceiling portion connecting the third side portion and the fourth side portion And, with the first side portion and the third side portion overlapping, the second side portion and the fourth side portion overlapping, the first module frame and the second module frame surround the battery cell stack.
  • the first side portion and the second side portion of the first module frame extend to upper corners of the second module frame, and the third side portion and the fourth side portion of the second module frame are the first module frame It can extend to the lower corners of the.
  • the plurality of battery cells may be stacked in an upright or inverted form to be parallel to the first side portion, the second side portion, the third side portion, and the fourth side portion.
  • the first side portion may be positioned between the third side portion and the battery cell stack, and the second side portion may be positioned between the fourth side portion and the battery cell stack.
  • each of the third side portion and the fourth side portion may be welded to lower edges of the first module frame to form a coupling portion.
  • At least one of the third side portion and the fourth side portion may include a bent portion extending from the first side portion and the second side portion and bent in an inward direction.
  • At least one of the third side portion and the fourth side portion may include a mounting portion extending from the first side portion and the second side portion and bent in an outward direction.
  • the mounting portion may be positioned adjacent to a lower edge of the first module frame.
  • One or more through holes may be formed in the mounting portion.
  • the battery module may further include an adhesive member positioned at least one of between the first side portion and the third side portion and between the second side portion and the fourth side portion.
  • the battery module may further include a rigid member positioned at least one of between the first side portion and the third side portion and between the second side portion and the fourth side portion.
  • the rigid member may include at least one of a plastic member and a metal plate.
  • the first module frame may be a metal plate in which the first side part, the second side part, and the bottom part are integrated
  • the second module frame may be a metal plate material in which the third side part, the fourth side part, and the ceiling part are integrated. have.
  • the battery module may further include a thermally conductive resin layer positioned between the bottom portion and the battery cell stack.
  • Both sides of the module frame may be thicker than the upper and lower surfaces.
  • FIG. 1 is an exploded perspective view showing a battery module having a conventional mono frame.
  • FIG. 2 is an exploded perspective view showing a battery module according to an embodiment of the present invention.
  • FIG. 3 is a perspective view showing a state in which constituent elements constituting the battery module of FIG. 2 are combined.
  • FIG. 4 is a cross-sectional view taken along the cut line A-A' of FIG. 3.
  • FIG. 5 is a perspective view illustrating a welding connection between a first module frame and a second module frame.
  • FIG. 6 is a cross-sectional view of a battery module for explaining bonding between a first module frame and a second module frame through an adhesive member.
  • FIG. 7 and 8 are perspective views illustrating a first module frame and a second module frame according to a modified embodiment of the present invention.
  • FIGS. 9 and 10 are perspective views illustrating a first module frame and a second module frame according to a modified embodiment of the present invention.
  • FIG. 11 is a cross-sectional view of a battery module for explaining the rigid member of the present invention.
  • a part of a layer, film, region, plate, etc. is said to be “on” or “on” another part, this includes not only “directly above” another part, but also a case where another part is in the middle. . Conversely, when one part is “directly above” another part, it means that there is no other part in the middle.
  • the reference part means that it is located above or below the reference part, and means that it is located “above” or “on” in the direction opposite to gravity. no.
  • FIG. 2 is an exploded perspective view showing a battery module 100 according to an embodiment of the present invention.
  • 3 is a perspective view showing a state in which components constituting the battery module 100 of FIG. 2 are combined.
  • the battery module 100 is a battery cell stack 120 in which a plurality of battery cells 110 are stacked, and a module accommodating the battery cell stack 120 It includes a frame 200.
  • the module frame 200 includes a first module frame 300 with an open top and a second module frame 400 with an open bottom.
  • both the front and rear surfaces of the first module frame 300 and the second module frame 400 are opened, and end plates 150 are positioned at the opened front and rear surfaces, and the battery cell stack 120 and the end plate A bus bar frame 130 is positioned between 150.
  • the first module frame 300 includes a first side portion 311, a second side portion 312 and a bottom portion 330, and the first side portion 311 and the second side portion 312 are parallel to each other. And, the bottom portion 330 connects the first side portion 311 and the second side portion 312. That is, the first module frame 300 is a plate-shaped structure bent so as to continuously surround both sides and bottom surfaces of the battery cell stack 120, and includes a first side portion 311, a second side portion 312, and a bottom portion. 330 may be an integrated metal plate. Further, the first module frame 300 may be a U-shaped frame having a U-shaped cross-sectional shape cut along the yz plane, but is not limited thereto.
  • the second module frame 400 includes a third side portion 411, a fourth side portion 412 and a ceiling portion 430, and the third side portion 411 and the fourth side portion 412 are parallel to each other, and the ceiling portion 430 connects the third side portion 411 and the fourth side portion 412. That is, the second module frame 400 is a plate-shaped structure bent so as to continuously surround both sides and upper surfaces of the battery cell stack 120, and the third side portion 411, the fourth side portion 412, and the ceiling portion ( 430) may be an integrated metal plate.
  • the second module frame 400 may be a U-shaped frame having a U-shaped cross-sectional shape cut along the yz plane, but is not limited thereto.
  • the first side portion 311 and the third side portion 411 overlap, and the second side portion 312 and the fourth side portion 412 overlap. , Enclosing the top, bottom, and both sides of the battery cell stack 120. This part will be described again with reference to FIG. 4 below.
  • FIG. 4 is a cross-sectional view taken along the cut line A-A' of FIG. 3.
  • the first side portion 311 and the third side portion 411 overlap, the second side portion 312 and the fourth side portion 412 overlap, and the battery cell stack 120 is It is accommodated between the module frame 300 and the second module frame 400.
  • Each of the plurality of battery cells 110 constituting the battery cell stack 120 includes first and second side surfaces 311 and 312 of the first module frame 300 and the third and third of the second module frame 400. It is preferable that they are stacked upright or inverted to be parallel to the fourth side portions 411 and 412.
  • a swelling phenomenon may occur in which an internal electrolyte is decomposed and gas is generated, thereby swelling its appearance.
  • it may swell mainly in the direction of the arrow (Y-axis direction and the opposite direction) of FIG. 4, and as the number of battery cells 110 increases, a swelling phenomenon occurs. The magnitude of the internal pressure due to it increases.
  • the frame surrounding the battery cell stack In order to withstand such a swelling phenomenon, the frame surrounding the battery cell stack must have a certain rigidity or more, and in order to do so, its thickness needs to be thickened to some extent.
  • the thickness of the upper and lower surfaces irrelevant to the swelling phenomenon also increases, so that the weight of the battery module is unnecessarily increased.
  • the module frame in this embodiment may be formed of a first module frame 300 and a second module frame 400, that is, two module frames 300 and 400, Since the first side portion 311 and the third side portion 411 overlap, and the second side portion 312 and the fourth side portion 412 overlap, a structure having both sides thicker than the upper and lower surfaces may be formed. That is, both sides of the module frame can be implemented thicker so that the swelling phenomenon of the battery cell 110 can be directly controlled, and at the same time, the upper and lower surfaces are implemented relatively thin, so the volume or weight of the battery module is unnecessary. Can be prevented from increasing.
  • the first module frame 300 has a structure in which a metal plate is bent, and between the first side portion 311 and the bottom portion 330, and between the second side portion 312 and the second side portion 312. Lower corners 320 are formed between the bottom portions 330, respectively.
  • the second module frame 400 has a structure in which a metal plate is bent, and the upper edge 420 is formed between the third side portion 411 and the ceiling portion 430 and between the fourth side portion 412 and the ceiling portion 430. Are formed.
  • first side portion 311 and the second side portion 312 of the first module frame 300 extend to the upper corners 420 of the second module frame 400, and the second module frame 400
  • the third side portion 411 and the fourth side portion 412 may extend to the lower corners 320 of the first module frame 300.
  • the deformation force may be locally concentrated at the corners as well as the first to fourth side parts 311, 312, 411, 412, and thereby There may be a problem with cracking.
  • the structure in which the first side portion 311 and the second side portion 312 of the first module frame 300 extend to the upper corners 420 of the second module frame 400 and the second module frame 400 The third side portion 411 and the fourth side portion 412 of the first module frame 300 form a structure extending to the lower corners 320 of the first module frame 300, thereby reducing the deformation force applied to the corner portion of the first module frame 300.
  • the second module frame 400 may complement each other.
  • the battery cell stack 12 was horizontally inserted along the X-axis direction as indicated by an arrow.
  • the assembly tolerance at the time of insertion must be considered, so it is necessary to design the height of the mono frame 20 with a margin. there was.
  • the module frame 200 of FIG. 2 moves the battery cell stack 120 in the vertical direction (Z) through the open upper part of the first module frame 300 and the open lower part of the second module frame 400. Can be assembled along the direction opposite to the axis). Accordingly, it is possible to set the height of the module frame 200 to be lower, thereby configuring a more compact battery module. That is, since the space utilization rate can be increased by reducing the free space between the battery cell stack and the frame, the capacity and output of the battery module 100 can be further improved.
  • the first side portion 311 may be positioned between the third side portion 411 and the battery cell stack 120, and the second side portion 312 is a fourth side portion 412. And the battery cell stack 120 may be located between.
  • the second module frame 400 may form a wider width than the first module frame 300 with respect to the Y-axis direction, and may be positioned further outside the battery cell stack 120.
  • the first module frame 300 forms a wider width and is positioned further outside the battery cell stack 120, or the first module frame 300 and the second module frame 400 are alternately positioned.
  • the configuration is possible, but when considering the order or ease of the process, the second module frame 400 covering the upper portion of the battery cell stack 120 as shown in FIG. 4 is more preferable to form a wider width. Do.
  • a thermally conductive resin layer 331 to be described later is formed on the bottom 330 of the first module frame 300, and a battery cell stack 120 is disposed on the thermally conductive resin layer 331.
  • the first side portion 311 and the second side portion 312 of the first module frame 300 may serve as a kind of guide member.
  • the second module frame 400 has a wider width than the first module frame 300 with respect to the Y-axis direction, so that the third side part 411 and the fourth side part 412 are each of the first side part 311 and the second side part 312. Inserting outward can make assembly easier.
  • FIG. 5 is a perspective view for explaining the welding connection of the first module frame and the second module frame, and for convenience of explanation, other components are omitted and only the first module frame 300a and the second module frame 400a are shown. .
  • each of the lower edges 320a of the first module frame 300a is welded to the end of the third side portion 411a and the end of the fourth side portion 412a of the second module frame 400a corresponding thereto.
  • the coupling portion CP may be formed by being combined in the manner of. In FIG. 5, only the fourth side portion 412a and the lower edge 320a are welded to form the coupling portion CP, but the extended end portion of the third side portion 411a also forms the coupling portion as described above. Of course it can be.
  • FIG. 6 is a cross-sectional view of a battery module for explaining bonding between a first module frame and a second module frame through an adhesive member.
  • the battery module according to the present embodiment is positioned at least one of between the first side portion 311b and the third side portion 411b, and between the second side portion 312b and the fourth side portion 412b.
  • An adhesive member 500 may be further included.
  • the adhesive member 500 is for fastening or bonding between the first module frame 300b and the second module frame 400b, and may include a resin or adhesive tape including an adhesive material.
  • the second module frame 400b is attached after applying or bonding the adhesive member 500 to the outer surfaces of the first side portion 311b and the second side portion 312b. It may be assembled, and the second module frame 400b may be assembled after applying or bonding the adhesive member 500 to the inner surfaces of the third side portion 411b and the fourth side portion 412b.
  • the bonding method in FIG. 5 or 6 corresponds to embodiments for bonding the first module frames 300a and 300b and the second module frames 400a and 400b, and in the present invention, in addition to the welding bonding or bonding member , Bonding, bolting, riveting, etc. can be applied without limitation.
  • a thermally conductive resin may be applied to the bottom 330 of the first module frame 300 to form a thermally conductive resin layer 331.
  • the battery cell stack 120 is positioned after pre-coating the thermally conductive resin, it is possible to prevent excessive injection than necessary as in the prior art.
  • the thermally conductive resin of the thermally conductive resin layer 331 may include a thermally conductive adhesive material, and specifically, may include at least one of a silicone material, a urethan material, and an acrylic material.
  • the thermally conductive resin may perform a role of fixing one or more battery cells 110 constituting the battery cell stack 120 by being liquid or solidified after application during application.
  • heat generated from the battery cell 110 can be quickly transferred to a heat sink (not shown) located below the battery module, thereby preventing overheating of the battery module.
  • FIG. 7 and 8 are perspective views for explaining the first module frame 300c and the second module frame 400c according to an embodiment modified from the present invention, and other configurations are omitted for convenience of description, Only the module frame 300c and the second module frame 400c are shown.
  • At least one of the third side portion 411c and the fourth side portion 412c may extend longer than the first side portion 311c and the second side portion 312c, and the extended portion is in the inward direction. It can be bent in (B direction).
  • FIG. 8 is a view showing after the extended portion in FIG. 7 is bent in the inward direction. Referring to FIG. 8, the extended portions of the third side portion 411c and the fourth side portion 412c are bent and thus the bent portion ( 440) was formed.
  • bent portion 440 By forming the bent portion 440, mechanical fastening between the first module frame 300c and the second module frame 400c is possible, as well as the lower edge of the first module frame 300c due to the aforementioned swelling phenomenon.
  • the deformation force applied to 320c) may be further supplemented through the bent portion 440.
  • welding may be further performed between the bottom portion 330c and the end portion of the bent portion 440.
  • FIGS. 9 and 10 are perspective views for explaining the first module frame 300d and the second module frame 400d according to an embodiment modified from the present invention, and other configurations are omitted for convenience of explanation, and the first module Only the frame 300d and the second module frame 400d are shown.
  • At least one of the third side portion 411d and the fourth side portion 412d may extend longer than the first side portion 311d and the second side portion 312d, and the extended portion is in the outer direction. It can be bent in (C direction).
  • one or more through holes 451 may be additionally formed in the extended portions of the third side portion 411d and the fourth side portion 412d.
  • FIG. 10 is a view showing after the extended portion in FIG. 9 is bent in an outward direction. Referring to FIG. 10, the extended portions of the third side portion 411d and the fourth side portion 412d are bent, and the mounting portion ( 450) was formed.
  • a device for fixing the battery module to a pack frame (not shown) is required. This is because when the battery pack is applied to a device to be described later, it is necessary to ensure safety against external vibration or shock.
  • the mounting portion 450 is formed to attach the battery module to the pack frame (not shown). Can be fixed.
  • a plurality of through holes 451 are formed in the mounting portion 450 of FIGS. 9 and 10, and bolts may be inserted through the through holes 451 to be fastened to a pack frame (not shown).
  • a pack frame not shown.
  • the through hole 451 in FIGS. 9 and 10 is an embodiment showing an example of a fixing method using the mounting part 450, and the mounting part using an adhesive member or welding without the through hole 451 A form in which 450 is fixed to the pack frame is also possible as a modified embodiment.
  • Swelling of the battery cell stack can be easily controlled through the second module frame 400d on which the mounting part 450 is formed, and the battery module can be fixed to the pack frame without separately forming a fastening structure.
  • various fixing and fastening structures may be applied by the mounting part 450 such as bolt fastening through a through hole, bonding and welding through an adhesive member, and the like.
  • the third side portion 411d and the fourth side portion 412d extend to the lower corners 320d of the first module frame 300d. It is more preferable that the mounting portion 450 is positioned adjacent to the lower corners 320d, respectively.
  • FIG. 11 is a cross-sectional view of a battery module for explaining a rigid member.
  • the battery module in this embodiment is located at least one of between the first side portion 311e and the third side portion 411e, and between the second side portion 312e and the fourth side portion 412e. It may further include a rigid member 600.
  • the rigid member 600 In preparation for the swelling phenomenon in which the battery cells 110 constituting the battery cell stack 120 swell in the direction of the arrow (Y-axis direction and the opposite direction), the rigid member 600 is placed at the above-mentioned position. , It is possible to secure additional rigidity. To this end, the rigid member 600 preferably includes at least one of a plastic member and a metal plate.
  • a rigid member in consideration of the number or swelling degree of the battery cells 110 constituting the battery cell stack 120 (600) can be additionally inserted.
  • the module frame formed of the two module frames 300e and 400e has a configuration that facilitates additional insertion of the rigid member 600.
  • the adhesive member in Fig. 6 for securing adhesion is further Can be located.
  • One or more battery modules according to the present exemplary embodiment described above may be mounted together with various control and protection systems such as a battery management system (BMS) and a cooling system to form a battery pack.
  • BMS battery management system
  • a cooling system to form a battery pack.
  • the battery module or the battery pack including the battery module may be applied to various devices.
  • a device may be applied to a vehicle such as an electric bicycle, an electric vehicle, or a hybrid, but is not limited thereto, and may be applied to various devices capable of using a secondary battery.

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  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Electrochemistry (AREA)
  • General Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Inorganic Chemistry (AREA)
  • Battery Mounting, Suspending (AREA)

Abstract

L'invention concerne un module de batterie qui, selon un mode de réalisation de la présente invention, comprend : un empilement de cellules de batterie dans lequel une pluralité de cellules de batterie sont empilées ; et un cadre de module destiné à recevoir l'empilement de cellules de batterie. Le cadre de module comprend un premier cadre de module ayant une partie supérieure ouverte et un second cadre de module ayant une partie inférieure ouverte. Le premier cadre de module comprend une première partie de surface latérale, une deuxième partie de surface latérale, et une partie de plancher reliant la première partie de surface latérale et la deuxième partie de surface latérale. Le second cadre de module comprend une troisième partie de surface latérale, une quatrième partie de surface latérale et une partie de plafond reliant la troisième partie de surface latérale et la quatrième partie de surface latérale. Le premier cadre de module et le second cadre de module entourent l'empilement de cellules de batterie dans un état dans lequel la première partie de surface latérale et la troisième partie de surface latérale se chevauchent mutuellement et la deuxième partie de surface latérale et la quatrième partie de surface latérale se chevauchent mutuellement.
PCT/KR2020/009062 2019-07-19 2020-07-10 Module de batterie et bloc-batterie le comprenant WO2021015461A1 (fr)

Priority Applications (4)

Application Number Priority Date Filing Date Title
EP20844948.8A EP3934015A4 (fr) 2019-07-19 2020-07-10 Module de batterie et bloc-batterie le comprenant
JP2021553110A JP7282436B2 (ja) 2019-07-19 2020-07-10 電池モジュールおよびそれを含む電池パック
US17/601,200 US20220166098A1 (en) 2019-07-19 2020-07-10 Battery module and battery pack including the same
CN202080022446.8A CN113614990B (zh) 2019-07-19 2020-07-10 电池模块和包括该电池模块的电池组

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
KR10-2019-0087909 2019-07-19
KR20190087909 2019-07-19
KR1020200082574A KR102475180B1 (ko) 2019-07-19 2020-07-06 전지 모듈 및 이를 포함하는 전지 팩
KR10-2020-0082574 2020-07-06

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WO2021015461A1 true WO2021015461A1 (fr) 2021-01-28

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US (1) US20220166098A1 (fr)
EP (1) EP3934015A4 (fr)
JP (1) JP7282436B2 (fr)
WO (1) WO2021015461A1 (fr)

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US20220190430A1 (en) * 2020-12-15 2022-06-16 Hyundai Motor Company Battery pack and method for manufacturing the same

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KR20210116062A (ko) * 2020-03-17 2021-09-27 주식회사 엘지에너지솔루션 전지 모듈 및 이를 포함하는 전지 팩

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JP2017504149A (ja) * 2014-11-10 2017-02-02 エスゼット ディージェイアイ テクノロジー カンパニー リミテッドＳｚ Ｄｊｉ Ｔｅｃｈｎｏｌｏｇｙ Ｃｏ．，Ｌｔｄ バッテリー及びその熱管理装置、並びにこのバッテリーを有するｕａｖ
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EP3934015A4 (fr) 2022-05-04
JP2022523848A (ja) 2022-04-26
JP7282436B2 (ja) 2023-05-29
US20220166098A1 (en) 2022-05-26
EP3934015A1 (fr) 2022-01-05

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